TOTAL RESONANT ABSORPTION OF ACOUSTIC-OSCILLATIONS IN SUNSPOTS

The question of total resonant absorption of acoustic oscillations in sunspots is studied for cylindrical 1-D flux tubes that are stratified only in the radial direction and surrounded by a uniform, non-magneti c plasma. The numerical investigation of Goossens and Poedts (1992) in linear resistive MHD is taken further by increasing the strength of t he azimuthal magnetic field in the equilibrium flux tubes. For relativ ely strong azimuthal magnetic fields, total absorption is found over a relatively wide range of spot radii.